Abstract
Competition between Poa fawcettiae Vickery, the dominant native snowgrass, and the invasive herbaceous Achillea millefolium L., was examined in three glasshouse experiments. The first experiment investigated the potential for intra‐specific competition in plants by growing them in pots with low and high density. The second experiment examined the potential for inter‐specific competition at low, medium and high density. In the third experiment plants in pots where either roots or shoots of the species could not compete were compared to those where root and shoot competition was possible. Achillea millefolium plants produced more than four times the biomass of P. fawcettiae plants. As a result the two species responded differently. In the A. millefolium monocultures both root and shoot biomass per plant declined at high density. By contrast, P. fawcettiae biomass was not affected. In mixed species pots, P. fawcettiae had no effect on the biomass of A . millefolium plants, while P. fawcettiae shoot and root biomass per plant decreased when grown with A. millefolium at all densities tested. Root competition from A. millefolium appears to be the main cause of the decrease in biomass of P. fawcettiae . The results imply that A. millefolium may have a competitive advantage over P. fawcettiae in the Australian Alps.
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Claims 7
Claim · model-written summary
Achillea millefolium produced more than four times the biomass of Poa fawcettiae.
- Taxon
- Achillea millefolium
Achillea millefoliumt0 - Outcome
- biomasse0
- Direction
- more thane0
- Value
- more than four timese0
- Comparator
- P. fawcettiaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Achillea millefolium plants produced more than four times the biomass of P. fawcettiae plants.”
t0“Poa fawcettiae and the environmental weed Achillea millefolium”
Claim · model-written summary
High density reduced both root and shoot biomass per A. millefolium plant in monoculture.
- Taxon
- Achillea millefoliumAchillea millefoliumt0
- Treatment
- high densitye0
- Outcome
- root and shoot biomass per plante0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the A. millefolium monocultures both root and shoot biomass per plant declined at high density.”
t0“Poa fawcettiae and the environmental weed Achillea millefolium”
Claim · model-written summary
P. fawcettiae biomass was unaffected by density.
- Taxon
- Poa fawcettiaePoa fawcettiaet0
- Outcome
- P. fawcettiae biomasse0
- Direction
- not affectede0
Not reportedTreatmentComparator
Verbatim
e0“By contrast, P. fawcettiae biomass was not affected.”
t0“Poa fawcettiae and the environmental weed Achillea millefolium”
Claim · model-written summary
P. fawcettiae did not affect A. millefolium biomass in mixed pots.
- Taxon
- Achillea millefoliumAchillea millefoliumt0
- Treatment
- P. fawcettiaee0
- Interactor
- P. fawcettiaePoa fawcettiaee0weed
- Outcome
- biomass of A . millefolium plantse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In mixed species pots, P. fawcettiae had no effect on the biomass of A . millefolium plants”
t0“Poa fawcettiae and the environmental weed Achillea millefolium”
Claim · model-written summary
A. millefolium reduced P. fawcettiae shoot and root biomass at all tested densities.
- Taxon
- Poa fawcettiaePoa fawcettiaet0
- Treatment
- grown with A. millefoliume0
- Interactor
- A. millefoliumAchillea millefoliume0weed
- Outcome
- P. fawcettiae shoot and root biomass per plante0
- Direction
- decreasede0
- Qualifier
- all densities testede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. fawcettiae shoot and root biomass per plant decreased when grown with A. millefolium at all densities tested.”
t0“Poa fawcettiae and the environmental weed Achillea millefolium”
Claim · model-written summary
Root competition from A. millefolium appears to explain reduced P. fawcettiae biomass.
- Taxon
- Poa fawcettiaePoa fawcettiaet0
- Interactor
- A. millefoliumAchillea millefoliume0weed
- Outcome
- decrease in biomass of P. fawcettiaee0
- Qualifier
- Root competitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root competition from A. millefolium appears to be the main cause of the decrease in biomass of P. fawcettiae .”
t0“Poa fawcettiae and the environmental weed Achillea millefolium”
Claim · model-written summary
A. millefolium may have a competitive advantage in the Australian Alps.
- Taxon
- Achillea millefoliumAchillea millefoliumt0
- Outcome
- competitive advantagee0
- Comparator
- P. fawcettiaee0
- Setting
- Australian Alpse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. millefolium may have a competitive advantage over P. fawcettiae in the Australian Alps.”
t0“Poa fawcettiae and the environmental weed Achillea millefolium”